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    <title>6.5</title>
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    // 1. revese  反转数组
    let a = [1,2,3]
    console.log(a.revese())


    // 2. sort   数组排序
    let b = [c,a,b]
    console.log(b.sort())


    // 3. join   数组转为字符串
    console.log(c.join())


    // 4. ConCat  数组拼接
    console.log(d.ConCat())


    // 5. toString  数组转为字符串
    console.log(E.toString())
    



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